METHODS AND APPARATUS FOR PROVIDING LIGHTING VIA A GRID SYSTEM OF A SUSPENDED CEILING

• US 20120044670A1
• Filed: 11/04/2011
• Published: 02/23/2012
• Est. Priority Date: 05/23/2005
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: PIEPGRAS, Colin, MOLLNOW, Tomas, MORGAN, Frederick M., DOWLING, Kevin J.
• Granted Patent: US 8,206,001 B2
• Time in Patent Office: Days
• US Class Current: 362/149
• CPC Class Codes: E04B 9/006 with means for hanging lighting fixtures or other appliances to the framework of the ceiling
• CPC Class Codes: F21S 2/00 Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21S 8/06 by suspension
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21V 21/35 with direct electrical contact between the supporting element and electric conductors running along the guiding element
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/71 using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/85 characterised by the material liquid coolants F21V29/56
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21V 7/0016 on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

Methods and apparatus for providing sources of light, or mechanical and/or electrical connections for light sources, via a grid system of a suspended ceiling. All or a portion of a grid system for a suspended ceiling may be configured to support the generation of light. Lighting units may be coupled to various portions of the grid system in a removable and modular fashion, so as to be completely or substantially recessed above the ceiling surface, or as pendant components hanging below the ceiling surface. Lighting interface components of the grid system also may be configured to facilitate significant thermal dissipation from lighting units. In one exemplary implementation, one or more LED-based lighting units may be coupled to one or more lighting interface components of the grid system so as to provide controllable multi-color and/or essentially white light.

Claims

1. A lighting interface component that forms at least a portion of a grid system for a suspended ceiling, comprising:

a central channel portion having first and second structural support members;

said first structural support member having a first flange, said first flange configured to support a first ceiling tile;

said second structural support member having a second flange, said second flange configured to support a second ceiling tile;

a cross member positioned between said first and said second structural support member and having a plurality of conductive tracks positioned on a first surface;

said cross member receiving at least one lighting unit on said first surface, said lighting unit positionable along said cross member;

a plurality of cooling features extending from a second surface of said cross member and into an enclosed air handling plenum;

wherein said enclosed air handling plenum forms an air flow channel within said central channel portion;

said lighting unit in thermal connectivity with said plurality of cooling features of said cross member;

wherein heat generated by a plurality of light sources positioned on said lighting unit is dissipated by at least some of said plurality of cooling features of said cross member.

2. The lighting interface component of claim 1 further including at least one perforation included in said cross member to allow air exchange to an area below said first and said second flanges.

3. The lighting interface component of claim 1 wherein said lighting unit is a printed circuit board with a plurality of LEDs, said plurality of LEDs in thermal connectivity with said plurality of cooling features in said enclosed hair handling plenum.

4. The lighting interface component of claim 1 wherein said air flow channel is positioned above said cross member support and said lighting unit.

5. The lighting interface component of claim 1 wherein said first and said second structural support members are integral with respective said first and second flange.

6. The lighting interface component of claim 1 wherein said lighting unit is retained within said central channel portion.

7. The lighting interface component of claim 1 wherein said cross member support includes cross member support rails configured to engage said at least one lighting unit.

8. The lighting interface component of claim 1 further including at least one air circulation component to facilitate a flow of air within said air flow channel.

9. The lighting interface component of claim 8 wherein said air circulation component is a fan positioned at a first end of said central channel portion increasing air flow over said heat dissipating cooling members thereby dissipating heat generated by said at least one lighting unit.

10. A lighting interface component that forms at least a portion of a grid system for a suspended ceiling, comprising:

first and second structural support members extending downwards to respective first and second flange members;

said first and second structural support members forming an open internal area for receiving a cross member support, said cross member support firmly retained between said first and said second structural support member;

said cross member support further having a plurality of electrical contacts extending longitudinally thereon;

wherein said first and said second flanges are configured to support portions of respective first and second ceiling tiles;

a lighting unit having a linear base member received between said first and said second structural support member;

said lighting unit further having a first housing extending upwards from a first end of said linear base unit, said first housing having a plurality of contacts;

wherein said linear base member has an upper surface with a plurality of cooling surface features;

said lighting unit retained by said cross member support;

said cross member support forming an air channel such that said plurality of cooling surface features extend into said air channel and facilitate the cooling of said lighting unit by dissipation of heat into said channel.

11. The lighting interface component of claim 10 wherein said first housing has a fan circulation unit formed therein to aid in circulation within said air channel.

12. The lighting interface component of claim 10 wherein said cross member support retains said housing at a first and second tab of said first housing formed on said lighting unit and forming said air channel when retained by said first and second tabs.

13. The lighting interface component of claim 10 wherein said cross member support further has longitudinally extending rails, said longitudinally extending rails engaging first and second tab formations on said first housing of said lighting unit.

14. The lighting interface component of claim 13 wherein said lighting unit has a second upwardly extending housing opposite said first housing, said first and said second housing enclosing a space defined by a lower surface of said cross member support and said first and said second housings.

15. The lighting interface component of claim 14 wherein said first housing includes a fan for circulation of air into said air channel.

16. A lighting interface component that forms at least a portion of a grid system for a suspended ceiling, comprising:

a housing having a first and a second structural support member, each of said first and said second structural support member ending in an outwardly extending flange;

a cross member support having a plurality of longitudinally extending conductive tracks on a first surface;

a hollow air flow conduit formed above said cross member support and between said first and said second structural support;

wherein said cross member support has a plurality of thermal conductive features on a second surface extending into said hollow air flow conduit;

a plurality of lighting units retained on said cross member support, each of said lighting units having at least one LED affixed to a substrate, said substrate having a plurality of electrical contacts which engage said plurality of longitudinally extending conductive tracks on said first surface of said cross member support;

wherein said substrate is in thermal transfer engagement with said plurality of thermal conductive features on said second surface of said cross member support thereby dissipating heat energy from said at least one LEDs into said hollow air flow conduit.